Menstruation! Of right lower abdomen painful very! What reason be

Menstruation when the right side of the abdominal pain is considered to be caused by gynecological diseases, such as appendicitis, pelvic inflammatory disease, ovarian cysts, tubal adhesions, endometriosis, etc. It may also be caused by cold dysmenorrhea, it is recommended that patients see a doctor in time, clear the cause of treatment.